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- W2137487941 abstract "We assessed the reliability of hormonal receptors (HR) by means of immunohistochemisty (IHC) on cell blocks obtained from diagnostic fine-needle cytopunctures in a group of 142 primary breast carcinoma. The results were compared to biochemical assessment (EIA) on their corresponding tissue samples (118 surgical specimens and 24 core needle biopsies). Percentage of stained nuclei and a score incorporating the proportion and the intensity of positive nuclei were evaluated. A two-group classification (cutoff 10% of stained nuclei) was used to define HR status. Highly positive tumors (>= 50% of stained nuclei) were also individualized. Regarding HR status, concordance rate between immunostaining and biochemical assessment was 86.6% for ER and 76.8% for PR. Major discrepancies were found in 6.3% and 15.5% of cases for ER and PR, respectively. A good correlation was also observed between quantitative values obtained by the two methods (r = 0.69 for ER and 0.60 for PR). Discrepancies were mainly related to weak positive staining, values close to the respective cutoffs and when biochemical evaluation was performed on core needle biopsies. We conclude that IHC on cell blocks prepared from fine-needle cytopuncture specimens of breast carcinomas is useful as a routine procedure for hormonal receptor determination especially when planning neoadjuvant treatment." @default.
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- W2137487941 date "2001-10-01" @default.
- W2137487941 modified "2023-10-15" @default.
- W2137487941 title "[Immunohistochemical determination of hormonal receptors on cell-blocks from fine-needle cytopunctures of breast carcinoma]." @default.
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